updating my iPhone 6s to 11.1

When I undated my iPhone to version 11.1 ios, my phone didn’t come up after one day and i just see the apple screen and i had to downgrade it to the previous version to fix the priblem. Today i again updated my iPhone to ios 11.1.1 , but i still don’t know whether it’s going to happen again or not. Is there anyone having the same problem? Is there any solution to fix it if happen?

Thanks in advance